Our Product Research Team
At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere.
That's because we have our own in-house Product Research team — they open the box,
verify contents, check the owner's manual, and record dimensions, features and specs.
We stay on top of new products and technologies to help people make informed choices.
Inputs and Outputs Notes
This Profile California AP740 amplifier features a bright red power light strip
on the top center of the unit to indicate when the amp is turned on. The 3-15/16"
power light strip consists of five LEDs. The green LED on the power/speaker
terminal side of the amplifier will also light when power is sent to the amp.
Converters: The amp is equipped with two external high (speaker) level to low
(line) level converters to allow you to connect the amplifier to a receiver or
factory radio without RCA preamp outputs or with only one pair of preouts. After splicing the receiver's speaker
wires to the converter's speaker wires, you can simply plug the converter into
the amp's RCA preamp input.
Line Outputs: The AP740
includes a pair of RCA line outputs for sending an unfiltered signal to another
amplifier or component without splitting the signal. Note: The line
outputs pass through the signal from channels 3 and 4.
Circuits: This amp has three types of
protection circuits: DC offset, short circuit and thermal protection. The red
LED on the left side of the amplifier will light to indicate that the amplifier
has gone into protection.
Built-In Crossovers: This
amplifier includes built-in variable low pass and high-pass filters, one for the
front channels (1 & 2) and one for the rear channels (3 & 4), each with a slope of
12dB/octave. The low-pass filters are continuously variable from 50-250Hz, while
the high-pass filters are continuously variable from 80Hz to 1.2kHz. Each pair
of channels has a three-way switch which lets you choose between low-pass,
high-pass, or full-range
Bass/Treble Boost: The rear
channels have a bass boost circuit, variable from 0 to 12dB at 45 Hz. The front
channels have a treble boost circuit, variable from 0 to 12dB at 8kHz.
and Outputs Notes
Gold-plated Terminals: The
AP740 features gold-plated speaker and power terminals and RCA jacks for
maximum signal transfer and corrosion resistance.
Set Screw Terminals: The power, ground, remote turn-on, and speaker
connections feature set-screw terminals that can accept
up to 6-gauge bare wire. A 2.5mm Allen wrench is supplied to
tighten/loosen the set screws.
Remote Turn-on: In addition to
turning on and turning off the amplifier via the head unit's remote output, the
remote turn-on also operates the reset circuit for the amplifier's protection
system. The remote turn-on lead must be connected to the head unit in order to
reset the protection circuits.
The manual indicates a 1-year parts and labor warranty,
Profile has extended the warranty to three years parts and labor for units
purchased from Crutchfield.